1ST! I. I ' J ^ ) ' ) 



and Victoria Institute at London ; Philosophical and Liter- 

 ary Society at Leeds; P. Cornwall Polytechnic Society: 

 Mr. James Henry, of Dublin ; the Mining Bureau at Mel- 

 bourne; the Wesleyan University, Connecticut ; American 

 Chemical Society, N. Y. ; Princeton Museum of Geology 

 and Archaeology ; Franklin Institute ; and Pennsylvania 

 Geological Survey. 



The death of Mr. John Walter Harden, in West Philadel- 

 phia, Nov. 8, aged 63 years, was announced by Mr. Lesley, 

 who was appointed to prepare an obituary notice of the 

 deceased. 



A communication, entitled "On Dioxyethyl-metbylene, 

 and the preparation of Methylene- chloride, by William II. 

 Greene, M.D.,"' was read. (Seepage 346.) 



Dr. Greene stated that a paper on the formation of dibenzyl 

 by the reaction described by him at the meeting of Oct. 17, 

 had been published by M. Silva in the Comptes Rend us of 

 Oct. 6. Priority must therefore be granted to M. Silva, 

 although the journal containing the results of his investi- 

 gations did not arrive here until after the presentation of 

 Dr. Greene's paper. 



Mr. Haupt made a short verbal report of the progress of 

 the extension of the U. S. Trigonometrical (Coast) Survey 

 in Berks, Chester and Lancaster counties, Pennsylvania. 



A communication, entitled "On the Coordination of the 

 various methods of expressing thought as applied to the 

 system of public school instruction, by Lewis M. Haupt, 

 C. E., Prof. Civ. Eng., Univ. Pa.," was read. (See page 348.) 



Mr. Eli K. Price referred to the growing use of graphical 

 testimony in the law practice of the courts. 



Mr. Briggs described the recent invention of a perpetual 

 battery by Profs. Houston and Thompson, exhibited at a 

 meeting of the Franklin Institute. 



Notes on the etymology of ypaxXys were read by Mr. 

 Lesley. 



The minutes of the last meeting of the Board of Officers 

 and members in Council were read. 



